Alarm-bell



(Nomaden.) A

l H. NICHOLS 8v H. C. ROSE.

ALARM BELL.

Batented Oct. 23

Nirn STATES ArtNr trice..

HERMAN NICHOLS AND HENRY C. ROSE, OE DETROIT, MICHIGAN.

ALARM-BELL..

SPECIFICATION forming part of Letters PatentiNo. 391,483, dated Octobe'r23, 1888.

Application tiled May 21, 1883. Serial No.2i`4,158. (No model.)

To all whom it may concern:

Be it known that we, HERMAN NICHOLS and HENRY .0. Rosa, citizens of the United States, residing at Detroit, in the county of Vayne and State of Michigan, have invented certain new and useful Improvements in Alarm-Bells, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to new and useful improvementsin mechanical bell-alarms; and the invention consists in the peculiar construction and combination of two bells and hammers with astriking mechanism actuated by a vibrating lever,which, when pulled in one direction, causes the hammers to strike alternately and in very rapid successiomwhile a spring forces the lever to quickly recover its normal position, so as to give the operator a chance to continue the ringing of the alarm indefinitely and almost without a break.

The invention further consists in a peculiar locking mechanism, whereby the hammers are arrested to prevent them from accidentally striking when the device is used for bicycles or other vehicles,where it is liable to be heavily jolted.

In the drawings which accompany the speciication, Figurel is an elevation of our device. Fig. 2 is a vertical central section thereof. Fig. 3 is a plan. Fig. 4: is a horizontal section with some of the operating parts removed to show the locking mechanism of the hammers more plainly.

A A are two bells inversely secured to the top and bottom, respectively, of the frame which carries the striking mechanism, and these bells are secured in proximity to each other, so as to leave an aperture, B, between them, through which the actuating-lever C of the striking mechanism projects to the outside. The bells inclose the whole striking mechanism, which consists of a suitable frame formed ofthe top and bottom plates, a b, secured to each other at a suitable distance apart by means of stays c.

l) is a shaft journaled in the plates a b, and upon this shaft the inner end ol" the lever Gis made fast.

E is a coilspring sleeved on the shaft D.

One end of this coil-spring is connected to the lever O, and the other end abuts against astationary part, whereby the tension of the spring is exerted to hold the lever in its normal position shown and to return it to such normal position when the lever is drawn from it.

-F is a ratchet-wheel fast on the shaft D.

G is a gear-wheel loose on the shaft D.

H is a spring-clickcarried by the geari opposite directions-one hammer to strikeV against the upper and the other against the lower bell.

N is another shaft journaled in the plates c b, and this shaft is provided with the arms O I), and with a coil-spring, Q, sleeved upon it, the latter being so connected at its free ends that the arm O is held by the tension of said spring in contact with the lever C, whereby in the normal position of said lever, as shown in the drawings, the other arm, l?, arrests one of the hammers, thereby preventing both hammers from striking accidentally against the bells.

In practice it will be seen that if the lever C is drawn out of its normal position against the tension of the spring E motion will beimparted to the striking mechanism, and `the hammers will alternately strike the upper and lower bell slow or fast, as desired, and if the lever is released as soon as it has reached the limit of its movement it will iiy back to its normal position and the operation of sounding the alarm may be repeated. If the operator has obtained a little practice, he may in this manner ring an almost unbroken alarm for any desired length of time, and vary instantly the rapidity of the striking to suithis IOO fancy or desire. lt will further be seen that the arm P, which arrests the hammers when the striking-lever is in its normal position, is drawn out of the way bythe spring A as soon as the arm O is not lockedin position by the lever C during the sounding of the alarm.

The device may be attached by means of the stem R to any part of a vehicle in proper position for operation either by hand or foot,

the lever C being suitably extended or shaped to permit its convenient operation in the desired manner.

We do not deem it necessary to specifically describe all the various applications which can be made of my device, as there are a variety of uses in which bells of this kind are employed, and no invention is needed to adapt our device to the ringing of a door-bell, burglar-alarm, dsc., as it is easy to devise suitable means for connecting the lever C with the door-knob or other parts through which the power is mechanically conveyed to aotuate the lever C.

That we claim as our invention is- 1. In a mechanical bell-alarm, the combination of two bells inversely secured in proximity to each other, the oscillating lever projecting laterally between the two bells, the striking mechanism inclosed between the bells and actuated by the movement of the oscillating lever in one direction, the spring retracting the oscillating lever to its normal position, and the two striking-hammers, with connections to said lever to cause said hammers to alternately strike the upper and lower bell, substantially as described.

2. In a mechanical bell-alarm, the combination of the two bells, A A, inversely secured in proximity to each other, a striking mechanism inclosed within the bells and provided with the oscillating lever C, projecting laterally between the bells and adapted to convey motion in one direction to the striking mechanism, the hammers L L Within said bells, the spring for retracting the leVerC to its normal position, the shaft N, provided with the arms O P, and the spring Q, serving to arrest the hammers in their normal position, substantially as and for the purposes described.

In testimony whereof we aflix our signatures, in presence of two witnesses, this 3d day of May, 18.88.

HERMAN NICHOLS. HENRY C. ROSE.

Witnesses:

P. M. HULBERT, JOHN SCHUMAN. 

